Trident ABW Transformer Switcher


Transformer Isolated ABW Box

The trident is our ultra clean, triple-output, transformer-isolated boutique ABW switch box. Studio grade amplifiers, powerful line drivers and audio isolation transformers ensure you can switch between amps and drive long cables with no loss of tone. Channel A out provides the master earth, whilst B and C offer transformer isolation, earth lift and phase mismatch correction. An always-on tuner output is also provided.

New! Now with upgraded OEP transformers

Oxford Electrical Products are a legendary British transformer manufacturer. The model we have chosen gives a richer, sweeter tone than the original Trident and has an extended frequency response of 30Hz to 30KHz so is now also ideal for bass guitar, 8 stringers and many other uses.

Currently, while stocks last, we are using NOS red enclosed OEP units so if you’re really into transformers you’re guaranteed something extra special. We’ll update this if we run out but we have secured a great stash of these so that’ll be a while yet.

After a long hiatus I’m pleased to be able to say that these are now back in stock and ready to ship!

5 in stock

SKU: ASTR Category:


  • OEP Transformer isolated B & C outputs to eliminate earth loop hum.
  • Ground lift on B & C outputs.
  • Phase reverse on B & C channels to allow different amps or effects to match up seamlessly.
  • Studio-grade buffered A output to provide perfect earthing and signal transmission on one channel only, just as it should be.
  • Always-on tuner out.
  • Hand made in Manchester, UK.
  • Can use a traditional PP3 battery for a return to that natural, free-roaming state of all pedals.
  • Our own custom circuitry designed from the ground-up to be as silent and neutral sounding as possible.